Normalize the numeric variables in a data frame
normalize(data, new_min = 0, new_max = 1)a data frame.
minimum for the transformed variables.
maximum for the transformed variables.
a data frame
normalize transforms all the numeric variables
in a data frame to have the same minimum and maximum values.
By default, this will be a minimum of 0 and maximum of 1.
Character variables and factors are left unchanged.
Use this function to be transform variables into a given range. The default is [0, 1], but [-1, 1], [0, 100], or any other range is permissible.
head(mtcars)
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4
#> Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4
#> Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1
#> Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
#> Hornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2
#> Valiant 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1
mtcars_st <- normalize(mtcars)
head(mtcars_st)
#> mpg cyl disp hp drat wt
#> Mazda RX4 0.4510638 0.5 0.2217511 0.2049470 0.5253456 0.2830478
#> Mazda RX4 Wag 0.4510638 0.5 0.2217511 0.2049470 0.5253456 0.3482485
#> Datsun 710 0.5276596 0.0 0.0920429 0.1448763 0.5023041 0.2063411
#> Hornet 4 Drive 0.4680851 0.5 0.4662010 0.2049470 0.1474654 0.4351828
#> Hornet Sportabout 0.3531915 1.0 0.7206286 0.4346290 0.1797235 0.4927129
#> Valiant 0.3276596 0.5 0.3838863 0.1872792 0.0000000 0.4978266
#> qsec vs am gear carb
#> Mazda RX4 0.2333333 0 1 0.5 0.4285714
#> Mazda RX4 Wag 0.3000000 0 1 0.5 0.4285714
#> Datsun 710 0.4892857 1 1 0.5 0.0000000
#> Hornet 4 Drive 0.5880952 1 0 0.0 0.0000000
#> Hornet Sportabout 0.3000000 0 0 0.0 0.1428571
#> Valiant 0.6809524 1 0 0.0 0.0000000